![Characterization of a natural inducer of coral larval metamorphosis [An article from: Journal of Experimental Marine Biology and Ecology]](https://www.ebooknetworking.net/books/B00/0PC/bigB000PC04U4.jpg)
Characterization of a natural inducer of coral larval metamorphosis [An article from: Journal of Experimental Marine Biology and Ecology]
Description
This digital document is a journal article from Journal of Experimental Marine Biology and Ecology, published by Elsevier in 2007. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.
Description:
External chemical signals used by scleractinian corals to recognize suitable substrata for larval settlement and metamorphosis were identified from crustose coralline red algae (CCA). A fragment of coral rubble with CCA induced larval metamorphosis of the scleractinian coral Pseudosiderastrea tayamai. A natural inducer and compounds that enhanced its effect in larval metamorphosis were isolated from the methanol extracts of coral rubble with CCA. A bromotyrosine derivative, 11-deoxyfistularin-3 (10^-^7 M) isolated from the CCA, induced the metamorphosis of P. tayamai larvae (27.5+/-24.0%). In the presence of fucoxanthinol (10^-^9 M) and fucoxanthin (10^-^9 M), the percentage of metamorphosis induced by the bromotyrosine derivative was further enhanced to 87.8+/-13.0 and 88.4+/-17.8%, respectively. Both carotenoids are also found in the coral rubble with CCA. These results suggest that bromotyrosine derivative and carotenoids have a synergistic effect in the metamorphosis of P. tayamai larvae. The synergistic effect provides a higher selectivity for recruitment than a single-component natural inducer for recognizing suitable substrata for larval metamorphosis. Thus, the effect might offer a survival advantage for benthic marine invertebrates.
Description:
External chemical signals used by scleractinian corals to recognize suitable substrata for larval settlement and metamorphosis were identified from crustose coralline red algae (CCA). A fragment of coral rubble with CCA induced larval metamorphosis of the scleractinian coral Pseudosiderastrea tayamai. A natural inducer and compounds that enhanced its effect in larval metamorphosis were isolated from the methanol extracts of coral rubble with CCA. A bromotyrosine derivative, 11-deoxyfistularin-3 (10^-^7 M) isolated from the CCA, induced the metamorphosis of P. tayamai larvae (27.5+/-24.0%). In the presence of fucoxanthinol (10^-^9 M) and fucoxanthin (10^-^9 M), the percentage of metamorphosis induced by the bromotyrosine derivative was further enhanced to 87.8+/-13.0 and 88.4+/-17.8%, respectively. Both carotenoids are also found in the coral rubble with CCA. These results suggest that bromotyrosine derivative and carotenoids have a synergistic effect in the metamorphosis of P. tayamai larvae. The synergistic effect provides a higher selectivity for recruitment than a single-component natural inducer for recognizing suitable substrata for larval metamorphosis. Thus, the effect might offer a survival advantage for benthic marine invertebrates.
